Work-In-Progress SiP32419EVB, SiP32429EVB www.vishay.com Vishay Siliconix Evaluation Board Manual DESCRIPTION SiP32419EVB and SiP32429EVB are a load switch that When the device is at OCP fault condition for over 8 ms the integrates multiple control features that simplify the design power switch will turn off, and the FLG pin will be pulled low. and increase the reliability of the circuitry connected to the In case of OT fault condition, the power switch will be off switch. The SiP32419EVB and SiP32429EVB are a 56 m immediately. The FLG pin will be pulled low. For the switch designed to operate in the 6 V to 28 V range. An SiP32429EVB, the fault flag will release 150 ms after the internally generated gate drive voltage ensures good R fault condition is cleared, and the switch will turn on at the ON linearity over the input voltage operating range. programmed slew rate. For the SiP32419EVB, the switch will remain off and the fault flag will remain on. The power The SiP32419EVB and SiP32429EVB have a slew rate switch can be reset by toggling EN or input power recycle if control circuit that controls the switch turn-on time to the over temperature fault is removed. value set by an external capacitor. This device features a low voltage control logic interface After soft start, an over-current protection circuit (OCP) which can be controlled without the need for level shifting. continuously monitors the current through the load switch, and controls the switch impedance to limit the current to the These devices also include a power good flag. The level programmed by an external resistor. If the over-current SiP32419EVB and SiP32429EVB are available in a space condition persists for more than 7 ms, the switch shuts efficient DFN10 3 mm x 3 mm package. off automatically. The SiP32419EVB and SiP32429EVB SiP32419EVB, SiP32429EVB EVALUATION have an over temperature protection circuit (OTP) which will shut the switch off if the junction temperature exceeds BOARD about 145 C. The OTP circuit will release the switch when SiP32419EVB and SiP32429EVB demo board is designed to the temperature has decreased by about 20 C of evaluate the over current protection and programmable soft hysteresis. star function of the device. POWER INPUT AND OUTPUT TERMINALS These power header terminals are designed for easily hood up to the power supply and the load for the evaluation (see fig. 1). The input voltage range for this evaluation is from 6 V to 24 V. CONNECTION AND SIGNAL TEST POINTS Power Input Terminal Power Output Terminal Fig. 1 - SiP32419EVB, SiP32429EVB Evaluation Board Rev. 2.0 Revision: 04-Apr-17 Document Number: 75689 1 For technical questions, contact: powerictechsupport vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000Work-In-Progress SiP32419EVB, SiP32429EVB www.vishay.com Vishay Siliconix INPUT CAPACITOR AND OUTPUT CAPACITOR OVER CURRENT LIMIT SETTING The input capacitors (C1 to C6) and output capacitors One of the key features of the SiP32419 and SiP32429 is to (C7, C8) are mounted close to the device to ensure stable provide over current limit protection. Current limit setting voltage right before and after the SiP32419EVB and resistor R can be calculated by the following formula to SET SiP32429EVB load switch (see fig. 2). The capacitances of set the current of the device: these capacitors are 10 F. The voltage rating for input and 1.24 V x 5000 I = output capacitor is 50 V. SiP32419EVB and SiP32429EVB LIM R SET devices can operate normally up to 28 V. It is importance to use the 35 V or higher rated capacitor for the input and Where: output capacitors. R is R5 on the board. SET I is the target current limit setting. LIM ENABLE TERMINAL The header J6 is directly connected to the EN pin for the PROGRAMMABLE SOFT POWER UP enable function of the device (see fig. 2). The voltage rating Soft power up is another feature of SiP32419EVB and of EN pin is 6 V. To have the design margin, never apply SiP32429EVB devices. The soft power time is not only the voltage higher than 5 V to this enable pin. The enable function of I and C but it also is the function load current SS SS threshold voltage is 1.5 V and the disable threshold voltage and current limiting setting. is 0.4 V or lower. The soft power time can be calculated by the following formula: FAULT FLAG AND POWER GOOD FLAG I R x 5000 V SS OUT OUT SiP32419EVB and SiP32429EVB devices have the fault flag = x C t R and power good flag to indicate the operation status of the SS SET device. The header J11 is connected to fault flag of the Where: device. The header J15 is connected power good of the t is the soft power up time device (see fig. 2). Both flags are open drain pin of the V is the output voltage power up range OUT device. An external bias voltage is required to header J1 and I is the built-in current to charge up C . The value is 5 A SS SS J3 to ensure proper operation of these flag. This external C is the soft power setting capacitor shown as C9 on the SS bias voltage can be provided by the input voltage by board shorting jumpers J2 and J4 because the voltage rating of the R is the current limit resistor, which is C5 on the board SET power good and fault flag are 28 V maximum. R is the output resistor OUT Switch EN Output Capacitors V Clamping Diode IN Input Capacitors Output Clamping Shottkey Output Capacitors Fig. 2 - SiP32419EVB, SiP32429EVB Evaluation Board Rev. 2.0 Revision: 04-Apr-17 Document Number: 75689 2 For technical questions, contact: powerictechsupport vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000